sampler.h

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/*
  Copyright (C) 2003-2013 Paul Brossier <piem@aubio.org>

  This file is part of aubio.

  aubio is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  aubio is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with aubio.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef AUBIO_SAMPLER_H
#define AUBIO_SAMPLER_H

/** \file

  Load and play sound files.

  This file loads a sample and gets ready to play it.

  The `_do` function adds the new samples to the input, and write the result as
  the output.

  \example synth/test-sampler.c

*/

#ifdef __cplusplus
extern "C" {
#endif

/** sampler object */
typedef struct _aubio_sampler_t aubio_sampler_t;

/** create new sampler object

  \param samplerate the sampling rate of the new sampler
  \param hop_size the block size of the new sampler

  \return the newly created ::aubio_sampler_t

*/
aubio_sampler_t * new_aubio_sampler(uint_t samplerate, uint_t hop_size);

/** load source in sampler

  \param o sampler, created by new_aubio_sampler()
  \param uri the uri of the source to load

  \return 0 if successful, non-zero otherwise

*/
uint_t aubio_sampler_load( aubio_sampler_t * o, const char_t * uri );

/** process sampler function

  \param o sampler, created by new_aubio_sampler()
  \param input input of the sampler, to be added to the output
  \param output output of the sampler

This function adds the new samples from the playing source to the output.

If `input` is not NULL and different from `output`, then the samples from `input`
are added to the output.

*/
void aubio_sampler_do ( aubio_sampler_t * o, const fvec_t * input, fvec_t * output);

/** process sampler function, multiple channels

  \param o sampler, created by new_aubio_sampler()
  \param input input of the sampler, to be added to the output
  \param output output of the sampler

This function adds the new samples from the playing source to the output.

If `input` is not NULL and different from `output`, then the samples from `input`
are added to the output.

*/
void aubio_sampler_do_multi ( aubio_sampler_t * o, const fmat_t * input, fmat_t * output);

/** get current playing state

  \param o sampler, created by new_aubio_sampler()

  \return 0 if not playing, 1 if playing

*/
uint_t aubio_sampler_get_playing ( const aubio_sampler_t * o );

/** set current playing state

  \param o sampler, created by new_aubio_sampler()
  \param playing 0 for not playing, 1 for playing

  \return 0 if successful, 1 otherwise

*/
uint_t aubio_sampler_set_playing ( aubio_sampler_t * o, uint_t playing );

/** play sample from start

  \param o sampler, created by new_aubio_sampler()

  \return 0 if successful, 1 otherwise

*/
uint_t aubio_sampler_play ( aubio_sampler_t * o );

/** stop sample

  \param o sampler, created by new_aubio_sampler()

  \return 0 if successful, 1 otherwise

*/
uint_t aubio_sampler_stop ( aubio_sampler_t * o );

/** destroy ::aubio_sampler_t object

  \param o sampler, created by new_aubio_sampler()

*/
void del_aubio_sampler( aubio_sampler_t * o );

#ifdef __cplusplus
}
#endif

#endif /* AUBIO_SAMPLER_H */